Asus P4S133 - Manual (Page 46)

34 Chapter 2: Hardware information
9. Digital audio connector (4-1 pin SPDIF1) (optional)
This connector connects an S/PDIF audio module that allows digital
instead of analog sound output. Connect one end of the audio cable to
the S/PDIF Out connector on the motherboard, and the other end to
the S/PDIF module.
P4S133
®
P4S133 Digital Audio Connector
SPDIF1
GND
+5V
SPDIF_IN
SPDIF_OUT
GND
1
The S/PDIF module is not included in the motherboard package.
P4S133
®
P4S133 Audio Panel Connector
IAPANEL1
LineOut_RL
MIC LineOut_FR LineOut_FL NC MICPWR
NC
AGND
1
LineOut_RR
10. Front ipanel audio connector (10-1 pin IAPANEL1) (optional)
This is an interface for the Intel audio cable that permits convenient
audio control from the front panel.